The Freezing Construction Technology Applied in the Highly Confined Groundwater Cretaceous Stratum with High Flow Rate of Western China
GUO Yong-fu
Abstract：It is always one of difficulties to carry out freezing construction in highly confined groundwa-ter stratum with high flow rate ,and it is more difficult under such geologic condition in cretaceous stratum. Main shaft of Gaojiabao coal mine ,located in Changwu County of Shanxi Province ,drills through quaternary stratum only 26.5 m ,and mainly through cretaceous stratum and Jurassic stra-tum. According to geologic reports ,it has high flow - rate groundwater (27.12 m/d) and highly con-fined water (the water head is 17.7 m over ground surface) at the same time ,expect common charac-ters of cretaceous stratum ,such as soft stratum ,lower compressive strength ,and the character of be-ing quite easily weathered and cemented. How to carry out freezing under such complicated geologic condition is the key point of the construction. In order to guarantee this construction safely finished , we conducted intensive studies on the freezing scheme and construction measures ,and established a set of perfect special construction measures. This paper introduces some construction technologies that can be used in similar constructions.
Keywords：cretaceous systemhigh flow ratehighly confined groundwaterfreezing
Publication Date：2015-10-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 5-7 )